Checkerwork construction



s. P. KI NNEY CHECKERWORK CONSTRUCTION Filed'Dec. 15, 1941 Fatented Dec,1, E9 42 rs srrss 2,303,559 CHECKERWORK CONSTRUQITION Selwyne r. Kinney,rittsbur a'ra, assignor to H. A. Brassert & Company, New York, N. Y., acorporation of Illinois- Application December-'15, 1941, Serial No.423,000

8 Claims. (Cl. 263-51) stable construction. Checkerwork of thischaracter provides vertical flues extending throughout the construction.

Checkerwork formed in this manner standard rectangular brick does notlend itself to the maximum area of heating surface for the volume of thecheckers. Other forms of checkers have been put into use for the purposeof giving increased area. of exposed surface, but

such forms, in general, require expensive and fragile brick of specialsizes and shapes. Where thinner brick are used to give increasedsurface, the checker construction is reduced in both strength andstability.

It is an object of the present invention to provide a new and improvedcheckerwork which is strong and stable in construction.

It is also an object to provide a checkerwork having a flue system whichis open from the top to the bottom of the checker system, with therequired.

it is a further object to provide a system of this character whichpresents a maximum of heat transfer surface per unit of brick volumewhile maintaining a strong and stable construction.

it is an additional object to provide a checker system which gives I a.high eflicienc'y of heat transfer with reversal of flow of gasthroughout the system.

It is another object to provide a checkerwork which presents bothvertical and horizontal heating surfaces, combined with cross flues,thus producing turbulent gas flow and rapid heat transfer throughout thesystem.

Other and further objects will-appear as the description proceeds.

i have shown certam preferred embodiments .7 of my inventionin-the'acoompanying drawing,

.in which Figure 1 is a fragmentary 'plan view of one form ofcheckerwork according to the present invention, one course of brickbeing broken away so as to show the next lower course;

Figure 2 is a perspective view showing one form of brick; v

Figure 3 is a section taken on line 3-3 of Figure 2;

Figure 4 is a view similar to Figure 2 but showing a modified form oibrick;

withslot ii is provided with flared portions Id ad- 30' flues arrangedso that they may be cleaned when from top to bottom thereo cutaway orflared portions 22.

Figure 5 is a section taken on line 5-5 of Figure 4;

Figure 6 is a view similar to Figure 1 but showing a modified form ofbrick; and

Figure 7 is a perspective view brick used in the construction of Figure6.

Referring first to the form of brick used in the checker construction ofFigure 1, the brick may beof the shape shown in Figures 2 and 3 or theshape shown in Figures 4 and 5. The 'difierences are readily apparent,particularly from a consideration of Figures 3 and 5. The brick ofFigures 2 and 3 is an elongated rectangle which.

may be of substantially the same proportions as usual types of brick.The brick is provided with a central slot I I which extends through thebrick The slot is so proportioned and located that end walls 12 of thebrick adjacent the ends of the slot are of a thickness substantiallyequal to the width of the slot, and the side walls it of the brick areof similar thickness. As shown in Figures 2 and 3, the

jacent the center of the upper and lower faces of the brick. Theseflared portions M are substantially equal in width to the width of theslot ii itself.

. The form of brick shown in Figures 4 and 5 differs from that ofFigures 2 and .3 only in that it is of considerably greater height. Thisbrick is provided with a slot 2! having "the lateral As shown in Figure5, these flared portions 22 do not extend to the median line of the,brick as is the case in the construction of Figures 2 and 3.

Referring now to Figure 1, which may be taken as showing the checkerworkmade with either the brick of Figures 2 and 3 or the brick of Figures- 4and'5, it will be apparent that the brick are laid up in what iscommonly designated a basketweave pattern. Taking the lower portion ofFigure 1, which represents a lower course of brick, certain brick 31extend horizontally in the figure, While theintermediate brick 32. areat bybrick 32. The slots H in the individual brickalso furnish verticalflues through the individual course considered.

The brick in the next course shown in the upper portion of Figure 1 areindividually placed at right angles to the brick immediately below themin the course, a portion of which is shown 'in the lower part ofFigure 1. Consequently the superposed central portions of the slots llform continuous flues from the top to. the bottom of the checkerwork.The cutaway or flared portions of the form of v v 'tional thickness asthe slot 4i.

the area varying from that of the flared portions i4 plus theintermediate portion of the slot ii to the full area oi-the slot ii atthe central horizontal plane of each brick It will be apparent from anexamination of Figure 1 that in this form of construction, due to therelative widths of the end walls I! and side walls II, there is nolateral transfer between the flues formed by the slots ii and similaradjacent flues, nor is there any transfer between such flues and thesquare flues 33 formed between the brick.

The form of brick shown in Figure 7 difl'ers from that previouslydescribed, in that the length of the brick is greater relative to itswidth. This brick is not provided with any flared portions of itscentral slots 4i. walls 43 are preferably of the same cross-sec- Apreferred method of laying up this brickis shown in Figure 6. Thesebrickare also laid up. in checkerangles to each other in the same manner asthe brick of'Figure 1.- Thevertical flues 44 between the brick arelarger in proportionto the brick than the similar flues 33 of theconstruction oi Figure 1. This form of brick and this method ofconstruction as shown in Figure 6-, however, differ from theconstruction of Figure 1 in that here there is a cross transfer or gasesbetween adjacent flues extending through the brick of the checkerwork.'I'his will be apparent from a con- The end walls 41 and side workdesigned withalternate bricks at right brick in a course being placed atright angles to each other to provide vertical passages betweensideration of the upper portion oi Figure 6. The

flue ll of a brick in the upper course of Figure 6 extends over thecentral portion of the flue designated by I I of the next lower courseof brick. immediately undemeath the brick designated as 45. Due to thelength and narrowness of the brick, however, the flue ll alsoextendsover the ends Ila and 1 lb of the slots I Lin the two bricks whose endsabut the center of the brick immediately below the brick 45.Consequently there is a constant interchange of gas between adjacentflues which increases the turbulence and the heat transfer as the gasespass upwardly or downwardly through the flues.

While I have shown certain preferred embodiments of my invention in theaccompanying drawing, it will be understood that the shapesand'proportions may be modifled to meet difl'er "ing conditions andrequirements and so aflord different proportioned areas of dues betweenand within the brick. I contemplate, therefore, such modifications ascome within the spirit and scope of the appended claims.

What is claimed is: *1. 'Checkerwork construction comprising a plu-"rality of, courses of brick, the individual brick having elongated slotsextending vertically therethrough, superposed-brick in successivecourses being placed at right angles to ,each other with centralportions of the elongated slots in alignment to form continuous verticalflues.

2. Checkerwork construction comprising a plurality of courses of brick,the individual brick having elongated slots extending verticallytherethrough, superposed brick in successive courses being placed atrightangles to each other with central portions of the elongated slotsin alignment to term continuous vertical flues, the brick tendingvertically therethrough, the alternate having the aligned portions ofthe slots flared outwardly adjacent the upper and lower faces of thebrick.

3. Checkerwork construction comprising a plurality of courses of brick,the individual brick having elongated slots extending verticallytherethrough, superposed brick in successive courses being placed atright angles to each other with central portions of the elongated slotsin alignment to form continuous vertical flues, the brick having thealigned portions of the slots flared outwardly adjacent the upper andlower faces of the brick, the flared portions being substantially equalin length to the width of the slot in the adjacent brick.'

4. pheckerwork construction comprising a plurality oi courses ofhorizontally elongated brick, the individual brick having elongatedslots extending vertically therethrough, the alternate brick in a coursebeing placed at right angles to each other to provide vertical passagesbetween the brick, the brick in superposed courses being located withportions of the slots in registration to provide vertical passagesthrough the brick.

5. Checkerwork construction comprising a pinrality .01 courses ofhorizontally elongated brick, the individual brick having elongatedslots extending vertically therethrough, the alternate the brick, andsuccessive courses being placed with the vertically adjacent brick atright angles to each other with the central portions of the elongatedslots in alignment with each other to a form vertical flues.

8. Checkerwork construction comprising a plurality of courses ofhorizontally elongated brick, the individual brick having elongatedslots extending verticallytherethrough, the alternate brick in a coursebeing placed at right angles to.

each other to provide vertical passages between the brick, andsuccessive courses being placed with the vertically adjacent brick atright angles to each other with the central portions of the elongatedslots in alignment with each other to form vertical flues, the brickhaving the aligned central portions of the slots flared outwardlyadjacent their upper and lower faces.

7. Checkerwork construction comprising a plurality of courses ofhorizontally elongated brick, the individual brick having elongatedslots exbrick in a course being placed at right angles to each other toprovide vertical passages between the brick, the brick in superposedcourse; being located with portions oi the slots in registration toprovide vertical passages through the. brick,

the brick being so sized and shaped that the vertical passages betweenthe brick are square in cross section. a I

8. Checkerwork construction comprising a plurality of courses ofhorizontally elongated brick,

the individual brick". having elongated slots ex-' tending verticallytherethrough, the alternate brick in a course being placed at rightangles to each other to provide vertical p ssages between the brick, andsuccessive courses being placedwith the vertically adjacent'brick atright angles to each other with the central portions of the elongatedslots in alignment with each other to form vertical flues, the end.portions of the slot in each brick overlying the end portions of theslots of other bricks in vertically adjacent courses.

. ssawm P. may.

